Film drying and developing apparatus



April 8, 1924, 1,489,m1

5. D. KLAUS FILM DRYING AND DEVELOPING Arnluws Filed 28 1921 IIVEITOR I Sum/Em hi/70s.

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Patented Apr. 8, 1924.

SIDNEY D. KLAUS, OF NEW YORK, N. Y.

FILM DRYING- AND DEVELOPING APPARATUS.

Application filed May 28, 1921.

To all whom it may concern.

Be it known that SIDNEY D. KLAUs, citizen of the United States, and resident of the city of New York, in the county and 6 State of New York, has invented certain new and useful Improvements in Film Dry-- ing and Developing Apparatus, 01: which the following is a specification.

This invention relates to film drying and developing apparatus.

lore particularly, the invention is directed to a device adapted for use in developing and drying dental X-ray films.

One object thereof is the provision of a device of the character described which shall be adapted for easy and handy use with the usual dental lathe equipment of the dentists oflice.

Another object is to provide a device of the type described which may be adapted for use in first developing and then rapidly drying a plurality of dental films.

A further object is to provide in a device of the character described a film holder in which a dental film may be securely held while being developed and while being dried without an appreciable portion of the film coming in contact with the holding members.

A still further object is'to provide a device of the character described which shall be efficient in its operation and simple in construction and use to a high degree.

Other objects of this invention will in part be obvious and in part hereinafter pointed out. I

The invention accordingly consists in the features of construction, combinations of elements and arrangement of parts which will be exemplified in the construction hereinafter described and of which the scope of application will be indicated in the following claims- In the accompanying drawings, in which is shown one of various possible illustrative embodiments of this invention,

Fig. ,1 is a vertical cross sectional view showing an embodiment of this invention in use when developing the dental film;

Fig. 2 is a partial vertical elevational view showing the embodiment oithe invention shown in Fig. 1 mounted on the dental lathe and in use in drying the film; and

Fig. 3 is a cross-sectional view out along Serial No. 473,251.

line 3-3 of F ig. 1 showing in,bottom plan the head member in which the film holders are held,

Referring in detail to the drawing, the embodiment of the invention there shown is seen to comprise a holding member or head 10 in which are removablyheld the film holders 11 in the manner hereinafter more fully described. This head 10 comprises a preferably cylindrical hub piece 12 hollowed'out so as to provide a central screw projection 13 upstanding from the interior bottom support of said hub and on which may thread a cap member 15. The

hub 12 is further "formed on the interior thereof with an inwardly extending shoulder 15 and depressed from the interior bot tom surface of the hub is a concentric arcuately curved recess 25. The cap member 15 is formed with an annular flange 16 of a diameter substantially equal to the internal diameter of the member 12. This cover member is formed with a knurled thumb piece 18 for manipulation thereof and has further an extension 19 interiorly threaded as at 20 for the screw projection 13 of the member 12. When the cover 15 is threaded on to the screw projection 13 in the manner described, the flange 16 rests on the annular shoulder 15 as will be readily understood. Spaced slots 21 are formed in the member 12 and these extend vertically across the outer cylindrical surface of the member 12 and radially on the interior thereof as shownin Fig. 3, intersecting the ridge in indentations 26.

The film holder comprises the body portion 22 and a handle portion 23. The body portion 22 is provided with retaining members 2a in the form of portions overturned from the material of the body about the edges thereof, shown clearly in Fig. 1. These overturned portions upstand from the body portion at a small angularity sufiicient for them to abut against the edge of the dental film when the film is in place. As is well known, dental films are made of a somewhat elastic material and the film (shown at 27 may be made to snap in between these retaining members 2%: by virtue of its elas: ticity and in so doing the bounding edges ot the film abut against the retaining members 2i. lVhen the hub is revolved with the film holder and film 27 in place therein, the

a head member having recesses therein adapted to receive the film holders, a cap for said head member adapted to frietionally engage said holders when said cap is in position on said hub, means in said hub permitting said holders when positioned therein to be rotated at various angles, said hub member and cap member having central openings therein adapted to be in registry with each other as and for the purpose described and specified. 10 Signed at Ne York city, in the county of New York and State of New York, this 19 day of May 1921.

SIDNEY D. KLAUS, D. D. S. 

